Improvement in machines for bending- corrugated-metal plates



ASA JOHNSON, OF vBROOKLYN,'NEW YORK.

Letters Patent No. 105,805, dated July 26, 1870.

The Schedule referred t0 in these Letters Patent and making part of the same.

\ To all whom 'it lmay conce/rn:

Be it known that I,.,AsA J oHNsoN, of Brooklyn, in the county of Kings and in the State of New York, have invented certain new and useful Improvements in Machines for Bending Corrugated Metal; and docorrugated metal-into arch-form, as will be hereinafter fully set forth.

-In order to enable others skilled in the art to which my invention gappertains to'maker and use the same, I will now proceed todescribe its construction and op eration, referring to theanuexed drawing, in which- Figure lis a transverse vertical section of the entire machine; i i

Figure 2 'is 'al plan view of the same, with the top roller removed;

Figure 3 is a plan view of a clamp used to hold the corrugated metal on' the bending-roller 5j and Figure 4 is a view of a corrugated back used in the machine. 1

c represent the sides of my machine, 'in which a roller, b, or rather the journals of a roller, b, have their bearings.

The .roller b is corrugated circumferential] y, as shown in iig.4 2, and one of its journals is provided with a cog-wheel, c, outside ofjthe side a.'

Above the roller b, in movable journal-boxes g y, is placed aroller, f, which is also corrugated circumferentially, and its corrugations should 4correspond with and t into the corrugations on the roller b.

lThe journalfboxes g g are held down by lmeans of the set-screws h la.

The cog-wheel c, upon vone of the journals of the roller b,.gears with a pinion 4or smaller cog-wheel on one of the journals oi'` the roller f, so that the two rollers will revolvetogether.

The backp ofthe machine is adjustable by means ofthe screw-rods t i, andset-screws on top, as shown.

On the innerer frontside of the back are placed thesupporting-blocks l lwhich are curved or semi-- corrugated 4 piece of sheet metal, is placed a piece of corrugated wire-eloth, and the two are soldered together so as to form, as it were, one solid piece The corrngations of the, wire-cloth run at right angles with the corrugations of the sheet metal, orlongitudinally, as shown.

In the rollerb is cut a groove, d, running longitud4 inally the entire length of the roller, in which groove. the clamp c is inserted.l

This clamp is made of a thin piece or strip of sheet metal, doubled lengthwise, and then corrugated to correspond vwith the corrugations on the roller. .The corrugated strip is then-opened, so as to stand at about right angles, and in the ngle is soldered a rod, fr, the ends of which are inserted in metal bars n n, at the'ends of the roller l, thus hinging the clamp to the roller. One half of the clamp litsl on the roller, while the other half' projects downward in the groove d.

It will he noticed, from the construction of the clamp, 'that the concave portions of the corrugations -of the inner half of the clamp are directly opposite the convex corrugations of Ithe outer half, which latter fit over the corrugations on Ythe roller b. l

Over the edge of the clamp, within the groove d, is placed a bent `strip, s, of metal, which, of course` only touches the centers ofthecorrugatons.v

- 4This strip, being then firmly soldered to the'elamp,

prevents the corrugations of the clamp .from spreading, as to do this the strip s must be stretched lengthof course,`be laidso as to fit the corrugations of the roller l.

When the machine is in operation, the roller f presses the clamp e, with the corrugated metal, down onto'the roller b, until the metal passes between-the arch `Ic and the rollerb, when the arch, of course, holds the clamp down, so as to make it retain' the metal. As soon as the roller b has revolved far enough to bring the clamp on thefront again, vthe clamp opens itself', from its own gravity, as its inner edge is heavier v than the outer, from theaddition of the strip s."

Although I deem it best to use both the arch k and roller f, still it is `not absolutely necessary, as either one of them may be dispensed with, and still corrugated rnetal will be bent in proper shape.

1f the arch It is dispensed with, and one or more top rollers, f, used valone, then u. slight variation of the clampA e'will be necessary, namely, making it rigid instead of hinged.

Having thus fully described my invention,

NVhat I claim as new, and desire to secure by Letters Patent, is

l. The clamp e, constructed as described, of a doubled piece of sheet metal, corrugated and then opened, hinged in the groove d on the roller b, and its inner edge provided with the strip s, all substantially as and for the purposes herein set fort-h'.

2. The arch k, formed as described, of :t corrugated plate of sheet metal and corrugated sheet of wire-cloth soldered together in one piece, the corrugations of the one running at right angles to the corrugations of the other, substantially as and for the purposes herein set forth.

3. The combination ofthe corrugated roller b, with ygroove d, clamp e, and corrugated roller f, all substantially as and for the purposes herein set forth.

4. The combination ofthe corrugated roller b, with groove d, clamp e, corrugated roller f, and the arch k, ll substantiallyr as and for the purposes herein set orth.

5. The arrangement of the adjustable back p, adjustable supporting blocks lI l, arch k, and roller b, substantially as herein set forth.

In testimony that I claim the foregoing, I have hreunto set my hand this 23d day of June, 1870.

ASA JOHNSON.

Witnesses:

C. L. EvER'r, A. N. MARR. 

